I have a question about the OS 1.40RX. I have the non efi version. My question is I have the 1.40, a hatori header and a hatori pipe (these are 100% identical to the OS, I believe OS just put their name on it.) My question is, is this system pre-tuned? Where should the pipe be in relation to the header? directly against it or space? does the header need to be cut to get increase in rpm? i appreciate any info before I go cutting the pipe, and initial setup, thank you